यदि $\sqrt{-5-12 i}$ और $\sqrt{5+12 i}$ के वास्तविक भाग धनात्मक हैं,$\sqrt{-8-6 i}$ का वास्तविक भाग ऋणात्मक है,और $a+i b = \frac{\sqrt{-5-12 i}+\sqrt{5+12 i}}{\sqrt{-8-6 i}}$ है,तो $2 a+b =$

  • A
    $3$
  • B
    $2$
  • C
    $-3$
  • D
    $-2$

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$\sqrt{a \pm i b}=x \pm i y, x>0$ लेकर,यदि हमें $\frac{\sqrt{21+12 \sqrt{2} i}}{\sqrt{21-12 \sqrt{2} i}}=a+i b$ प्राप्त होता है,तो $\frac{b}{a}=$

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